The Mechanical Handling and Storing of Material
Forfatter: A.-M.Inst.C E., George Frederick Zimmer
År: 1916
Forlag: Crosby Lockwood and Son
Sted: London
Sider: 752
UDK: 621.87 Zim, 621.86 Zim
Being a Treatise on the Handling and Storing of Material such as Grain, Coal, Ore, Timber, Etc., by Automatic or Semi-Automatic Machinery, together with the Various Accessories used in the Manipulation of such Plant
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586 THE MECHANICAL HANDLING OF MATERIAL
Hydraulic Crane Tip at Middlesbrough.—An entirely different type of coal-loading
apparatus is illustrated in Fig. 831, and represents the movable hydraulic crane tip at
Middlesbrough for loading coal direct from the docks into ships. It consists of a heavy
pillar revolving on a built pedestal, which has an archway large enough to pass a loco-
motive and box wagons. The lower part of the pillar is carried in a footstep attached
to the bottom of the pedestal above the archway, while the upper bearing of the pillar
Fig. 831. Hydraulic Crane Tip at Middlesbrough.
is formed by the top of the
pedestal. The pillar car-
ries jibs pivoted on a pin
at its heel, the radius of
which can be varied within
wide limits by a hydraulic
cylinder and ram placed
in an inclined position at
the back of the pillar^ this
ram being connected with
the head of the jib by
girders. The turning of
the pillar and jib is effected
by hydraulic cylinders
placed at the back of the
pillar, alongside the lifting
cylinder, and acting on a
chain which fits into a
cupped drum round the
top of the pedestal. The
lifting mechanism is placed
within the cheeks of the
pillar, and consists of a
hydraulic cylinder with
rams and multiplying
sheaves. There is also a
tipping cylinder placed be-
tween the turning cylinders
on the back of the pillar,
and acting upon the tip-
ping chain by which the
rear end of the wagon is
tipped up. Attached to
the lifting and tipping
chains is a cradle, for re-
ceiving coal trucks of either
end or bottom door pattern, which fits into a seat which can be placed on the rails at
any point without in any way cutting up the quay. The moving of the crane is effected
by a hydraulic engine placed in the pedestal connected to the travelling wheels by shafts
and gearing. This hydraulic crane has a lifting power of 15 to 30 tons, the height
of lift being 66 ft. It was built by Sir W. G. Armstrong, Whitworth, & Co., Ltd.,
and is one of the latest developments of this kind of tip.
Similar cranes were erected at Avonmouth Docks and elsewhere, but with the